Phytoplankton Growth in Surface Water Samples from the Central South

question 179

Multiple Choice

Phytoplankton growth in surface water samples from the central South Pacific Ocean was tested.Some samples were untreated.Others had iron, phosphorus, or silica added.The water was already high in nitrogen, so nitrogen was not added.Addition of silica did not change NPP.Addition of iron increased NPP fivefold.Addition of phosphorus increased NPP slightly.These results indicate that phytoplankton growth in this part of the ocean is primarily limited by

• A) nitrogen.
• B) phosphorus.
• C) iron.
• D) silica.
• E) both nitrogen and phosphorus.

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Definitions:

Jacob Lawrence

An African-American painter known for his portrayal of African-American life and history through his series of narrative paintings.

The Migration of the Negro

A series of paintings by artist Jacob Lawrence depicting the mass movement of African Americans from the rural South to the urban North in the early 20th century.

Discrimination

The unjust or prejudicial treatment of different categories of people, especially on the grounds of race, age, or sex.

Postmodernist

Pertaining to Postmodernism, a late 20th-century movement across various fields that emphasizes skepticism towards grand narratives, preferring instead to focus on individual perspective and cultural context.